Zhiyunda ZYD-NP96 96-Channel Pesticide Residue Rapid Tester

Overview

The Zhiyunda ZYD-NP96 96-Channel Pesticide Residue Rapid Tester is a dedicated benchtop photometric analyzer engineered for high-throughput quantitative screening of organophosphorus and carbamate pesticide residues in food and environmental samples. It operates on the internationally standardized enzyme inhibition rate principle—based on acetylcholinesterase (AChE) or butyrylcholinesterase (BChE) activity suppression—where residual pesticides inhibit enzymatic hydrolysis of chromogenic substrates (e.g., 5,5′-dithiobis-(2-nitrobenzoic acid), DTNB), resulting in measurable absorbance changes at 412 nm. This method is harmonized with national standards including GB/T 5009.199–2003 (China), AOAC Official Method 2007.01, and aligned with ISO/IEC 17025 requirements for validated rapid screening platforms. Designed for routine use in resource-constrained or high-volume settings, the ZYD-NP96 delivers reproducible optical density measurements across all 96 wells simultaneously, supporting batch processing of up to 96 independent samples per run without manual repositioning.

Key Features

• 96-well microplate-compatible optical detection system with integrated 8-channel parallel photometric measurement architecture
• High-stability LED light source (412 nm peak emission) featuring low power consumption, extended service life (>10,000 h), and rapid thermal response
• Closed-loop automatic optical calibration system that dynamically adjusts LED intensity in real time to compensate for ambient temperature fluctuations and long-term drift
• Intelligent preheating and thermostatic control module maintaining optical path stability within ±0.2 °C during continuous operation
• Automated zero (0%) and full-scale (100%) calibration—no user intervention required before each assay cycle
• Precision sample positioning mechanism with motorized stage alignment ensuring consistent well-to-well optical path length (<±5 µm positional repeatability)
• Programmable orbital shaking function (speed: 100–1,200 rpm; duration: 0–300 s) to enhance substrate-enzyme reaction homogeneity
• Onboard self-diagnostic routines verifying optical integrity, fluidic path status, and sensor calibration validity prior to assay initiation

Sample Compatibility & Compliance

The ZYD-NP96 accepts standard 96-well polystyrene or UV-transparent microplates (flat-bottom or U/V-bottom). It supports aqueous extracts from diverse matrices—including leafy vegetables, fruits, tea leaves, cereal grains, drinking water, and surface rinse solutions—following validated sample preparation protocols per GB 2763–2021 and EU Regulation (EC) No 396/2005 Annex I. All assay procedures comply with Good Laboratory Practice (GLP) documentation requirements. The instrument’s firmware implements audit-trail logging (user ID, timestamp, calibration events, result exports) to support regulatory readiness under FDA 21 CFR Part 11 and ISO/IEC 17025 Clause 7.7. Data integrity is further ensured via non-volatile memory retention and tamper-evident export logs.

Software & Data Management

Equipped with embedded Linux-based firmware, the ZYD-NP96 features a 5-inch capacitive touchscreen interface with intuitive Chinese/English bilingual navigation. Measurement data—including raw absorbance values, inhibition rates (%), concentration estimates (mg/L), pass/fail flags, and QC metrics—are stored locally with time/date stamping and user authentication. USB 2.0 host port enables direct connection to Windows/Linux PCs for CSV or Excel-formatted data export. Optional ZYD-DataLink software (v3.2+) provides statistical analysis (mean, SD, CV%), trend charting, report generation compliant with CNAS-CL01:2018, and integration with LIMS via ODBC drivers. All software modules undergo periodic validation per ICH Q2(R2) guidelines.

Applications

• Routine surveillance testing in provincial and municipal agricultural product quality supervision centers
• On-site screening at farm gate collection points, wholesale markets, and supermarket QA laboratories
• Environmental monitoring of irrigation water and soil leachates for pesticide runoff assessment
• Hotel and catering industry HACCP prerequisite program verification for raw material acceptance
• Educational use in food science curricula for teaching enzymatic inhibition kinetics and rapid assay design principles
• Pre-screening tool prior to confirmatory analysis by GC-MS or LC-MS/MS in accredited reference labs

FAQ

What pesticide classes does the ZYD-NP96 detect?
It quantitatively measures organophosphorus (e.g., chlorpyrifos, diazinon) and carbamate (e.g., carbaryl, methomyl) compounds based on cholinesterase inhibition kinetics.
Is method validation documentation available?
Yes—full validation reports covering specificity, linearity (R² ≥ 0.995), precision (intra-assay CV ≤ 4.2%, inter-assay CV ≤ 5.8%), and robustness are provided upon request per ISO/IEC 17025 Section 7.2.2.
Can the instrument be integrated into an existing LIMS?
Yes—via USB-hosted CSV export or optional ZYD-DataLink middleware supporting HL7 and ASTM E1384 message formats.
What maintenance is required for long-term accuracy?
Annual optical path verification using NIST-traceable neutral density filters and quarterly cleaning of cuvette holder surfaces with lint-free isopropyl alcohol wipes are recommended.
Does the system meet international regulatory requirements for food safety testing?
It supports compliance with Codex Alimentarius GLPs, China’s GB/T 27404–2008, and serves as a validated rapid screen under EU Commission Regulation (EU) 2022/2423 for pre-market residue monitoring programs.